Bowmalloy 36219 Hex Head Cap Screw 1-8 X 3-1/2 in Grade 9

Product Description

The BOWMALLOY 36219 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Measuring 1-8 thread size by 3-1/2 inches in length under the head, this screw features a zinc-plated clear chromate finish that provides corrosion resistance in moderate-exposure environments. The partial threading pattern is suited for clamping applications where a smooth shank is required for proper joint alignment. Licensed tradespeople and maintenance technicians working in heavy equipment, OEM machinery, and structural fabrication rely on this grade for demanding load requirements.

This cap screw is suited for use in Inch-system assemblies requiring a high-torque, high-clamp-load fastener. Grade 9 alloy steel offers greater tensile strength than the more common Grade 5 and Grade 8 designations, making it appropriate for hydraulic equipment, off-highway machinery, and heavy-duty mechanical joints. The zinc clear chromate coating provides a baseline level of corrosion protection for indoor or light-outdoor service environments. Package quantity is 10 units per pack.

Key Features

• Grade 9 alloy steel construction for elevated tensile and proof load strength
• Zinc-plated clear chromate finish for corrosion resistance in moderate environments
• Partially threaded shank for accurate clamping and joint alignment
• 1-8 thread size with 3-1/2 inch length under head for deep-reach fastening
• Inch measurement system compatible with standard SAE tooling
• Sold in packs of 10 units to match typical service quantities

Compatibility

Designed as an OEM-style replacement or service fastener for Inch-system assemblies requiring a 1-8 thread size, Grade 9 alloy steel hex head cap screw with partial threading.

Installation Notes

Installation should be performed by a qualified mechanic or millwright familiar with high-strength fastener procedures. Always verify thread engagement depth and mating material compatibility before torquing. Use calibrated torque tooling appropriate for Grade 9 fasteners and follow the applicable equipment manufacturer torque specifications. Inspect threads for damage and ensure the mating nut or tapped hole meets the required strength grade before assembly.